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Generation De Frequences Infrarouges Par Melange De Lasers A Colorants Pulses Dans Des Cristaux Non Lineaires
Download Generation De Frequences Infrarouges Par Melange De Lasers A Colorants Pulses Dans Des Cristaux Non Lineaires full books in PDF, epub, and Kindle. Read online Generation De Frequences Infrarouges Par Melange De Lasers A Colorants Pulses Dans Des Cristaux Non Lineaires ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Génération de fréquences infrarouges par mélange de lasers à colorants pulsés dans des cristaux non linéaires by : Pascal Mutin
Download or read book Génération de fréquences infrarouges par mélange de lasers à colorants pulsés dans des cristaux non linéaires written by Pascal Mutin and published by . This book was released on 1988 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deux radiations de grandes finesses spectrales (6 mhz) provenant de deux lasers à colorant impulsionnels (puissances crêtes 7kw et 12 kw), ceux-ci amplifiant une longueur d'onde continue, sont mélangées dans le cristal de iodate de lithium. La fréquence générée par ce milieu est la différence de leurs fréquences et est accordable dans l'infrarouge de 1600 cm-1 à 2600 cm-1. Une première étude porte sur les caractéristiques de la source infrarouge. Du fait de la finesse spectrale de cette source (environ 6mhz),un spectromètre infrarouge haute résolution fonctionnant sur le principe de l'absorption différentielle a été conçu. Une deuxième étude rend compte des performances d'un tel spectromètre : celles-ci ont été testées sur la molécule de protoxyde d'azote.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji
Download or read book Quantum Mechanics, Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
Book Synopsis Solid State Dosimetry by : Klaus Becker
Download or read book Solid State Dosimetry written by Klaus Becker and published by . This book was released on 1973 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Organic Solid-State Lasers by : Sébastien Forget
Download or read book Organic Solid-State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Book Synopsis Laser: 50 Years Of Discoveries by : Fabien Bretenaker
Download or read book Laser: 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.
Author :John Henry Lorentz Publisher :Historical Dictionaries of Asia, Oceania, and the Middle East ISBN 13 : Total Pages :570 pages Book Rating :4.F/5 ( download)
Book Synopsis Historical Dictionary of Iran by : John Henry Lorentz
Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Book Synopsis Light Filaments by : Jean-Claude Diels
Download or read book Light Filaments written by Jean-Claude Diels and published by IET. This book was released on 2022 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume starts with tutorials about the science of filamentation before presenting in-depth chapters on the latest research, technologies and applications. It cover wide aspects of light filaments considering various mediums of propagation, with structured or single filaments, and filaments of different colours, as well as combined filaments. It also includes a wide range of applications from strong field ionisation and molecular properties to laser development and beam shaping, THz, lasing in air and supercontinuum generation.
Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Book Synopsis Quaternary Vegetation Dynamics by : Jürgen Runge
Download or read book Quaternary Vegetation Dynamics written by Jürgen Runge and published by CRC Press. This book was released on 2021-11-28 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book celebrates the relaunch of the African Pollen Database, presents state-of-the-art of modern and ancient pollen data from sub-Saharan Africa, and promotes Open Access science. Pollen grains are powerful tools for the study of past vegetation dynamics because they preserve well within sedimentary deposits and have a huge diversity in ornamentation that allows different taxa to be determined. The reconstruction of past vegetation from the examination of ancient pollen records thus can be used to characterize the nature of past landscapes (e.g. abundance of forests vs. grasslands), provide insights into changes in biodiversity, and gain empirical evidence of vegetation response to climatic change and human activity. In this, the 35th Volume of "Palaeoecology of Africa", we bring together new data and extensive synthetic reviews to provide novel insights into the relationships between human evolution, human activity, climate change and vegetation dynamics during the Quaternary, the last 2.6 million years. Current and ongoing climate and land-use change is exerting pressure on modern vegetation formations and threatening the livelihoods and wellbeing of many peoples in Africa. In this book the focus is on the Quaternary because it is during this geological period that the modern vegetation formations developed into their current configurations against a backdrop of high magnitude global climate change (glacial-interglacial cycles), human evolution, and a growing human land-use footprint. In this book the latest information is presented and collated from around the African continent to parameterize past vegetation states, identify the drivers of vegetation change, and assess the vegetation resilience to change. To achieve this research from two broad themes are covered: (i) the present is the key to the past (i.e. studies which improve our understanding of modern environments so that we can better interpret evidence from the past), and (ii) the past is the key to the future (i.e. studies which unlock information on how and why vegetation changed in the past so one can better anticipate trajectories of future change). This Open Access book will provide a strong foundation for future research exploring past ecological, environmental and climatic change within Africa and the surrounding islands. The book is organized regionally (covering western, eastern, central, and southern Africa) and it contains specialized articles focused on particular topics (such as modern pollen-vegetation relationships and fire as a driver of vegetation change), as well as regional and pan-African syntheses drawing together decades of research to assess key scientific questions (including the role of climate in driving vegetation change and the role of vegetation change in human evolution). These articles will be useful to students and teachers from high school to the highest level of university who are interested in the origins and dynamics of vegetation in Africa. Furthermore, it is also meant to provide societally relevant information that can act as an inspiration for the development of sustainable management practices for the future.
Book Synopsis Philostratus by : Philostratus (the Athenian)
Download or read book Philostratus written by Philostratus (the Athenian) and published by . This book was released on 1912 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Luminescence Dosimetry by : Frank H. Attix
Download or read book Luminescence Dosimetry written by Frank H. Attix and published by . This book was released on 1967 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific Canadian Mechanics' Magazine and Patent Office Record by : Canada. Patent Office
Download or read book Scientific Canadian Mechanics' Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Historical Dictionary of Pakistan by : Shahid Javed Burki
Download or read book Historical Dictionary of Pakistan written by Shahid Javed Burki and published by . This book was released on 1999 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pakistan is unlike most other countries in the emerging world. It is one of the two nations – the other being the state of Israel – founded on the basis of religion. Although it was created to provide a homeland for the Muslim community of British India, in its original form it was able to accommodate only about half of the people of Islamic faith who lived in the subcontinent. Pakistan’s birth in 1947 resulted in one of the largest movements of people in human history when some 14 million people left their homes, with 8 million Muslims leaving India for what is now Pakistan and 6 million Hindus and Sikhs moving in the opposite direction. This was the first large-scale incidence of ethnic cleansing the world was to witness. --
Book Synopsis Génération paramétrique infrarouge dans les cristaux de La3Ga5,5Ta0,5O14 et BaGa4Se7 by : Elodie Boursier
Download or read book Génération paramétrique infrarouge dans les cristaux de La3Ga5,5Ta0,5O14 et BaGa4Se7 written by Elodie Boursier and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Il y a actuellement un réel besoin de sources lasers tout solide capables d'émettre un rayonnement cohérent depuis l'infrarouge lointain au térahertz pour des applications variées comme la spectroscopie et la détection de molécules d'intérêt atmosphérique par exemple. La meilleure alternative est l'optique non linéaire paramétrique du second ordre permettant la conversion de fréquence d'un laser monochromatique dans un cristal massif aux propriétés optiques adaptées. Cependant il faut trouver de nouveaux matériaux car ceux déjà identifiés ne donnent pas satisfaction, leur grande faiblesse étant un seuil de dommage optique trop bas pour des applications à haute énergie. Nous sommes en mesure de relever ce défi en combinant depuis peu deux faisceaux complètement indépendants en accordabilité et en polarisation dans un échantillon taillé en forme de sphère ou de cylindre. Ainsi, nous étudions directement la génération de différence de fréquence dans le domaine de transparence du cristal en scannant son espace ou un plan. Il s'agit d'identifier les directions, dîtes d'accord de phase, où la biréfringence compense la dispersion en longueur d'onde des indices de réfraction, mais aussi les rendements de conversion et les acceptances spectrale et angulaires associés. Si des photons issus des deux faisceaux incidents traversent le cristal selon ces directions, des photons de longueur d'onde plus grande sont générés, avec une énergie optimale dont la valeur est d'autant plus élevée que le coefficient non linéaire du cristal est fort. La thèse est dédiée à l'étude de nouveaux cristaux uniques acquis d'équipes étrangères leaders dans leur élaboration. L'objectif visé est la conception de sources de lumière de type Oscillateur Paramétrique Optique (OPO) ou Générateur Paramétrique Optique (OPG) accordables dans l'infrarouge ou le térahertz, plus énergétiques que les sources actuelles.
Book Synopsis EMISSIONS VISIBLES ET INFRAROUGES DE CRISTAUX NON-LINEAIRES DE LINBO#3 ET LITAO#3 DOPES ND#3#+ OU ER#3#+, ELABORES A L'ETAT MASSIF OU SOUS FORME DE FIBRES by : ROZENN.. BURLOT LOISON
Download or read book EMISSIONS VISIBLES ET INFRAROUGES DE CRISTAUX NON-LINEAIRES DE LINBO#3 ET LITAO#3 DOPES ND#3#+ OU ER#3#+, ELABORES A L'ETAT MASSIF OU SOUS FORME DE FIBRES written by ROZENN.. BURLOT LOISON and published by . This book was released on 1997 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: LINBO#3 EST LE CRISTAL DONT LES PROPRIETES ELECTRO-OPTIQUES, ACOUSTO-OPTIQUES ET NON-LINEAIRES SONT AUJOURD'HUI LES PLUS EXPLOITEES. LA COMBINAISON DE CES PROPRIETES LIEES A LA MATRICE AVEC CELLES D'EMISSION D'UN ION TERRE RARE PERMET LA REALISATION DE SYSTEMES LASER AUTO-DECLENCHES, A MODES BLOQUES OU AUTO-DOUBLEURS DE FREQUENCE. DE PLUS, L'UTILISATION D'UN POMPAGE OPTIQUE PAR DIODE LASER PERMET D'OBTENIR DES SOURCES LASER TOUT SOLIDE COMPACTES EMETTANT DANS L'INFRAROUGE OU DANS LE VISIBLE APRES GENERATION DE SECOND HARMONIQUE. CETTE ETUDE EST CONSACREE A LINBO#3 ET LITAO#3, QUI POSSEDENT DES PROPRIETES STRUCTURALES ET OPTIQUES VOISINES, DOPES PAR LES IONS TERRES RARES ND#3#+ ET ER#3#+. LES MATERIAUX ETUDIES ONT ETE SYNTHETISES SOUS FORME D'ECHANTILLONS MASSIFS PAR LA METHODE CZOCHRALSKI OU DE FIBRES MONOCRISTALLINES ELABOREES PAR UNE METHODE DE ZONE FLOTTANTE SOUS CHAUFFAGE LASER CO#2 APPELEE L.H.P.G. (LASER HEATED PEDESTAL GROWTH). LES PROPRIETES SPECTROSCOPIQUES GENERALES SONT REPORTEES POUR LES DEUX DOPANTS. LES SECTIONS EFFICACES D'EMISSION STIMULEE, CALCULEES AUTOUR DE 1 M POUR L'ION ND#3#+ ET AUTOUR DE 1.5 M, DOMAINE DE SECURITE OCULAIRE, POUR L'ION ER#3#+, SONT PROMETTEUSES. UNE ETUDE DE GENERATION DE SECOND HARMONIQUE DANS LINBO#3:SC#2O#3:ND#3#+ MONTRE LA POSSIBILITE D'OBTENIR UN AUTO-DOUBLAGE EN FREQUENCE DE L'EMISSION IR DE L'ION ND#3#+ A TEMPERATURE AMBIANTE DANS LE VERT. L'ANALYSE DES DYNAMIQUES DE FLUORESCENCE ET DES TRANSFERTS D'ENERGIE ENTRE IONS DANS LES COMPOSES MONODOPES ER#3#+ ET COPODES YB#3#+-ER#3#+ A ETE REALISEE. L'ION YB#3#+ EST UTILISE COMME SENSIBILISATEUR POUR UN POMPAGE PAR DIODE LASER VERS 980 NM. LES MECANISMES D'ADDITIONS DE PHOTONS PAR TRANSFERT D'ENERGIE, EFFICACES ENTRE LES IONS ER#3#+ ET CONDUISANT A UNE FLUORESCENCE INTENSE VERS 550 NM, SONT AUSSI ABORDES. UNE ETUDE DE L'ABSORPTION ENTRE ETATS EXCITES A EGALEMENT ETE MENEE POUR LES DEUX DOPANTS AFIN DE CONNAITRE SON INFLUENCE SUR LES EMISSIONS DES IONS. DANS LE CAS DE L'ION ND#3#+, LES DOMAINES D'EMISSION IR ET D'AUTO-DOUBLAGE EN FREQUENCE DANS LE VERT SONT ANALYSES APRES POMPAGE DANS LE NIVEAU #4F#3#/#2 VERS 810 NM. POUR L'ION ER#3#+, LE VISIBLE ET LE PROCHE IR ONT ETE EXPLORES APRES POMPAGE DU NIVEAU #4I#1#3#/#2 VERS 1.5 M. LES AUTRES DOMAINES D'EXCITATION PAR DIODES LASER AUTOUR DE 800 ET 980 NM QUI CONDUISENT A UNE FLUORESCENCE VERS 550 NM SONT AUSSI ETUDIES. LES SECTIONS EFFICACES D'ABSORPTION ENTRE ETATS EXCITES SONT COMPAREES AVEC CELLES D'EMISSION STIMULEE.
